diff --git a/xen/common/kexec.c b/xen/common/kexec.c
index 444cae1b03..09a56249e2 100644
--- a/xen/common/kexec.c
+++ b/xen/common/kexec.c
@@ -401,7 +401,7 @@ static int kexec_init_cpu_notes(const unsigned long cpu)
 
     /* If we dont care about the position of allocation, malloc. */
     if ( low_crashinfo_mode == LOW_CRASHINFO_NONE )
-        note = xmalloc_bytes(nr_bytes);
+        note = xzalloc_bytes(nr_bytes);
 
     /* Protect the write into crash_notes[] with a spinlock, as this function
      * is on a hotplug path and a hypercall path. */
@@ -520,6 +520,8 @@ static int __init kexec_init(void)
         if ( ! crash_heap_current )
             return -ENOMEM;
 
+        memset(crash_heap_current, 0, crash_heap_size);
+
         crash_heap_end = crash_heap_current + crash_heap_size;
     }